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Bug#673596: libc6: FTBFS on wheezy/sid amd64 (test suite failures)



On Tue, May 29, 2012 at 10:07:42PM -0500, Jonathan Nieder wrote:
> Hi Thibaut,
> 
> Thibaut Girka wrote:
> 
> > I've been bitten by this bug too, and here is what I've gathered:
> >
> > tst-eintr1 spawns threads continuously, without joining them, until it
> > receives a SIGALRM.
> 
> Thanks for the analysis.
> 
> If I am reading correctly, tst-eintr1 tries to spawn 11 child threads,
> one of which sends SIGUSR1 to other threads in a loop with a handler
> that writes '.' and the other 10 of which spawn and join a child
> repeatedly in a loop.  At any given moment, there would be somewhere
> in the range of 12 to 22 active threads (1 x driver + 1 x signal
> source + 10 x tf1 + 0-10 x tf2).

Nevermind me, I must have been lacking some sleep :)
You're right, the test spawns 10 threads (and those are the only ones that aren't joined immediatly),
then, each thread + itself tries to spawn + join a thread...

> Have you noticed the test behaving differently?  Maybe when
> pthread_join returns the process is still around?  How do you know
> there are extra unjoined threads?

Well, no, after a quick inspection, it appears the test behaves correctly.
Then, I have no idea why it would fail.
12~23 threads is well within any limit set up on my system, as far as I can tell...

Sorry for wasting your time,
Thibaut Girka.

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